Metallic stair.



No; 851,932. PATENTED APR, 30, 1.907.

`S. GROSSMAN METALLIC STAIR.

APPLICATION FILED MAR.11. 1907.

UNITED STATES SAWUEL GROSSMAN,

or YNew YORK, 3N.` Y.

METALLIC STAIR.

Specification of LettersiPatent.

Patented April 30, 1907.

Application filed March 11,1907. Serial No. 361.660.

10 @ZZ whom t 'may concern:

Be it known that l, SAMUEL GnossMAN, a citizen of the United States, residing in the borough of Manhattan, New York city, county and State of New York, have invented certain new and useful Improvements in Metallic Stairs, of which the following is such a full, clear, and exact description as will enable any one skilled in the art to which it apertains to make and use the same, reference eing had to the acconpanying drawings, forming part of this speci ication.

My invention relates to sheet metal structures and is particularly well adapted for sheet metal stringers used in metallic stairs.

The principal objects of the invention are to provide a sheet metal striiiger or the like which is not only made of great strength and of comparatively light weight, but is at the same time .very ornamental, the manner of ornamenting the structure being such as to admit of a wide range in that respect.

Briefly stated, the invention consists in the Stringer or the like main part being itself made of a substantial thickness of sheet metal which -is rolled or formed into the desired sha e and constitutes the principal part, Whi e the ornamental part is an adjunct for the purpose of ornamentation, though when it is made of sheet metal itself it, of course, adds a certain degree of strength to the composite structure.

l have illustrated a type of my invention in the accompanying drawings, wherein Figure 1 is an end view of the main part of the stringer or like member, without the ornamental part inserted therein. Fig. 2 is an end view of the ornamental part or plate, shown as detached. Fig. 3 is a perspective view of the composite structure, showing the two parts illustrated in Figs. l and 2, respectively, as being put together, the ornamental plate or part being slid into the other.

Referring to the drawings, in which like numbers of reference designate like parts j throughout, l is a sheet metal stringer or like part which is formed of a suitable thickness of sheet metal an d has the longitudinal edges thereof bent over upon the same side of the Stringer so as to forni a hollow strengthening rib, one part 2 of which extends outwardly at right angles to the body of the stringer, while the in-turned portion 3 thereof projects in- Wardly and is corrugated for the purpose of strengthening it and at the same time forming an ornamental bead. The ends of the in- ,l turned edges are slightly spaced at et from the i body of the Stringer, the space being about l the thickness of the plate or sheet of ornafniental material 5 which is to be inserted f therein. The ornamental member or plate 5 l is made of suitable metal or any other desired y' material and is of lighter weight than the f main structure, as it is more particularly del signed to ornament the composite structure. ln the present construction this plate is shown as having a central panel (j extending the length thereof with raised corrugations or beads 7 at each side of the panel so as to give the pai't a rich ornamental appearance. y The edges of the plate 5 ai'e preferably left plain and smooth for the purpose of being l slid under the in-turi'ied parts 3 of the main f member l and after the plate 5 has been or- ,i namented as desired and completely finished, l it is then slid endwisc beneath the iii-turiied parts 3 so as to completely -lill the space between the edges of the main. part l. l From the foregoing description it will be seen that this composite structure admits of a wide range of ornamentation being given the same. The main part l of the structure may be formed of sheet steel or any suitably strong material which is rolled into the desired shape and substantially as vherein shown while the ornamental plate 5 may be able well known material and may be stamped with any suitable designs thereon or may have open work cut in the same for the purpose of ornamenting the completed structure. The ornamental sheet 5 need not, of course, be of metal, but in cases where it is made of metal a corresponding degree of strength is added to the structure.

This invention is not confined to stair structures but it is applicable to other constructions in sheet metal in which light weight with a certain amount ol'l strength is required, as well as ornamentation.

herein described may be varied as desired, in carrying out the invention as herein set forth.

Having thus described my invention what l claim and desire to secure by l'ietters Patent is combination of a sheet metal stringer or like piece having the longitudinal edges thereof bent over upon the saine side thereof, and an ornamental plate or sheet of material insertmad eof ordinary brass or copper or any suit- Of course, the size and shape of the parts 1 1. A metallic structure comprising the IOO ed beneath and between said overturned serted beneath and between said overedges.

2. A metallic structure comprising the combination of a sheet metal Stringer or like piece having the longitudinal edges thereof bent over upon the same side thereof and oonstituting a strengthening rib and suoli bent over parts being suitably ornamented7 and an ornamental plate or Sheet of material inl r l l l l l turned edges.

In testimony whereof, l have hereunto set my hand in the presence of tlie two subscribing witnesses.

' SAMUEL GROSSMAN.

W'itnesses SAMUEL K AHAN, BERNARD S. DEUTSCH. 

